https://www.bleepingcomputer.com/news/microsoft/windows-10-update-kb4482887-released-with-performance-fix-for-spectre-bug/ > Microsoft has released the Windows 10 KB4482887 cumulative update for build 1809 that includes numerous fixes including Retpoline Spectre mitigation, a fix for an annoying Action Center bug, and numerous other bug fixes. > This update is available to all Windows 10 October 2018 Update (build 1809) users and can be installed through Windows Update. To install the update, simply go into Settings -> Update & Security -> Windows Update and then check for new updates.